import ctypes from ctypes import c_int, c_char_p, c_void_p from cnotmuch.globals import nmlib, STATUS, NotmuchError class Database(object): """ Wrapper around a notmuch_database_t Do note that as soon as we tear down this object, all derived queries, threads, and messages will be freed as well. """ #constants MODE_READ_ONLY = 0 MODE_READ_WRITE = 1 _std_db_path = None """Class attribute of users default database""" """notmuch_database_get_path (notmuch_database_t *database)""" _get_path = nmlib.notmuch_database_get_path _get_path.restype = c_char_p """notmuch_database_open (const char *path, notmuch_database_mode_t mode)""" _open = nmlib.notmuch_database_open _open.restype = c_void_p """ notmuch_database_find_message """ _find_message = nmlib.notmuch_database_find_message _find_message.restype = c_void_p """notmuch_database_get_all_tags (notmuch_database_t *database)""" _get_all_tags = nmlib.notmuch_database_get_all_tags _get_all_tags.restype = c_void_p """ notmuch_database_create(const char *path):""" _create = nmlib.notmuch_database_create _create.restype = c_void_p def __init__(self, path=None, create=False, status= MODE_READ_ONLY): """ Open or create a notmuch database If path is None, we will try to read a users notmuch configuration and use his default database. Throws a NotmuchError in case of failure. """ self._db = None if path is None: # no path specified. use a user's default database if Database._std_db_path is None: #the following line throws a NotmuchError if it fails Database._std_db_path = self._get_user_default_db() path = Database._std_db_path if create == False: self.open(path, status) else: self.create(path, status) def create(self, path, status=MODE_READ_ONLY): """ notmuch_database_create(const char *path) :returns: Raises :exc:`notmuch.NotmuchError` in case of any failure (after printing an error message on stderr). """ res = Database._create(path, status) if res is None: raise NotmuchError( message="Could not create the specified database") self._db = res def open(self, path, status= MODE_READ_ONLY): """calls notmuch_database_open :returns: Raises :exc:`notmuch.NotmuchError` in case of any failure (after printing an error message on stderr). """ res = Database._open(path, status) if res is None: raise NotmuchError( message="Could not open the specified database") self._db = res def get_path(self): """notmuch_database_get_path (notmuch_database_t *database); """ return Database._get_path(self._db) def find_message(self, msgid): """notmuch_database_find_message :param msgid: The message id :ptype msgid: string :returns: Message() or None if no message is found or if an out-of-memory situation occurs. """ if self._db is None: raise NotmuchError(STATUS.NOT_INITIALIZED) msg_p = Database._find_message(self._db, msgid) if msg_p is None: return None return Message(msg_p, self) def get_all_tags(self): """Return a Tags() object (list of all tags found in the database) :returns: Tags() object or raises :exc:`NotmuchError` with STATUS.NULL_POINTER on error """ if self._db is None: raise NotmuchError(STATUS.NOT_INITIALIZED) tags_p = Database._get_all_tags (self._db) if tags_p == None: raise NotmuchError(STATUS.NULL_POINTER) return Tags(tags_p, self) def __repr__(self): return "'Notmuch DB " + self.get_path() + "'" def __del__(self): """Close and free the notmuch database if needed""" if self._db is not None: print("Freeing the database now") nmlib.notmuch_database_close(self._db) def _get_user_default_db(self): """ Reads a user's notmuch config and returns his db location Throws a NotmuchError if it cannot find it""" from ConfigParser import SafeConfigParser import os.path config = SafeConfigParser() config.read(os.path.expanduser('~/.notmuch-config')) if not config.has_option('database','path'): raise NotmuchError(message= "No DB path specified and no user default found") return config.get('database','path') @property def db_p(self): """Returns a pointer to the current notmuch_database_t or None""" return self._db #------------------------------------------------------------------------------ class Tags(object): """Wrapper around notmuch_tags_t""" class notmuch_tags_t(ctypes.Structure): """the opaque tags struct that is returned by functions.""" pass #notmuch_tags_get _get = nmlib.notmuch_tags_get _get.restype = c_char_p def __init__(self, tags_p, db=None): """ msg_p is a pointer to an notmuch_message_t Structure. If it is None, we will raise an NotmuchError(STATUS.NULL_POINTER). Is passed the db these tags are derived from, and saves a reference to it, so we can automatically delete the db object once all derived objects are dead. Tags() provides an iterator over all contained tags. However, you will only be able to iterate over the Tags once, because the underlying C function only allows iterating once. #TODO: make the iterator work more than once and cache the tags in the Python object. """ if tags_p is None: NotmuchError(STATUS.NULL_POINTER) self._tags = tags_p self._db = db print "Inited Tags derived from %s" %(str(db)) def __iter__(self): """ Make Tags an iterator """ return self def next(self): if self._tags is None: raise StopIteration nmlib.notmuch_tags_move_to_next(self._tags) if not nmlib.notmuch_tags_valid(self._tags): print("Freeing the Tags now") nmlib.notmuch_tags_destroy (self._tags) raise StopIteration return Tags._get (self._tags) def __del__(self): """Close and free the notmuch tags""" if self._tags is not None: print("Freeing the Tags now") nmlib.notmuch_tags_destroy (self._tags) #------------------------------------------------------------------------------ class Message(object): """Wrapper around notmuch_message_t""" """notmuch_message_get_filename (notmuch_message_t *message)""" _get_filename = nmlib.notmuch_message_get_filename _get_filename.restype = c_char_p """notmuch_message_get_message_id (notmuch_message_t *message)""" _get_message_id = nmlib.notmuch_message_get_message_id _get_message_id.restype = c_char_p """notmuch_message_get_tags (notmuch_message_t *message)""" _get_tags = nmlib.notmuch_message_get_tags _get_tags.restype = c_void_p def __init__(self, msg_p, parent=None): """ msg_p is a pointer to an notmuch_message_t Structure. If it is None, we will raise an NotmuchError(STATUS.NULL_POINTER). Is a 'parent' object is passed which this message is derived from, we save a reference to it, so we can automatically delete the parent object once all derived objects are dead. """ if msg_p is None: NotmuchError(STATUS.NULL_POINTER) self._msg = msg_p self._parent = parent print "Inited Message derived from %s" %(str(parent)) def get_message_id(self): """ return the msg id Raises NotmuchError(STATUS.NOT_INITIALIZED) if not inited """ if self._msg is None: raise NotmuchError(STATUS.NOT_INITIALIZED) return Message._get_message_id(self._msg) def get_filename(self): """ return the msg filename Raises NotmuchError(STATUS.NOT_INITIALIZED) if not inited """ if self._msg is None: raise NotmuchError(STATUS.NOT_INITIALIZED) return Message._get_filename(self._msg) def get_tags(self): """ return the msg tags Raises NotmuchError(STATUS.NOT_INITIALIZED) if not inited Raises NotmuchError(STATUS.NULL_POINTER) on error. """ if self._msg is None: raise NotmuchError(STATUS.NOT_INITIALIZED) tags_p = Message._get_tags(self._msg) if tags_p == None: raise NotmuchError(STATUS.NULL_POINTER) return Tags(tags_p, self) def __del__(self): """Close and free the notmuch Message""" if self._msg is not None: print("Freeing the Message now") nmlib.notmuch_message_destroy (self._msg)